// JavaScript Document
<!--
function checkMail()
{
	var x = document.forms[0].email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if(!(filter.test(x))) alert('Error! Please Check the Email address you provided - ' + x );
	else{
	document.book.submit();
	}
}
-->